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microsoftAs you know Windows Vista (like all Microsoft’s Operating Systems) allows you to change the program used to open a file (program association). This is very useful if you have installed a new software and you want to use it to open a file for which Windows Vista has associated its own tool such as: Windows Photo Gallery, Notepad, Windows Photo Gallery etc. Once you have associated a new program to a file there is no way to revert this procedure and automatically associate the program Windows Vista used by default. The only way to do that is to remember the name of the program by heart. Anyway there is a hack which will revert what you did to Windows factory state. Here is the procedure:

  1. Click Start.
  2. In the Search Bar type: regedit
  3. Press Enter.
  4. Navigate to the following key: HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ FileExts\ [extension]
  5. Click on the [extension]
  6. Click on the following key: UserChoice and delete all its subkeys
  7. If it doesn’t work, delete the UserChoice key itself.

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3 Comments to “Restore File Association (Extension Association) in Windows Vista to default settings”

  1. navid Says:

    wooow perfect!
    thank u man! it fix it

  2. oliver Says:

    regedit opens in wordpad!!:(

  3. Stephanie Says:


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